Spark arrester



.-'Georgia, have invented fcertainnew' and use- `.ful- Improvements in Spark Arresters; and

Patented Sept. 2G, i922..

f-NTE TMgES Per enr` hdddld F i CE.,

WILLIAM LAYFAYET'T TARVN, OF ROMEJ GEORGIA.

Granit iriafaits'rrua.fy

Application 'filed 'December 31, 1921. Serial No. 526,433.

- I do hereby .declarethev following to be a full, clear, and eXact description of the `in venti/on, such as ,will enable others skilled in 101' the art.to. which it appertains'to malte and use the saine. Y.

My invention relates to improvements in vsparlrarresters adapted for'usev on the top w off-stationary iiues, such forv instance as the fiues of chimneys, smoke-stackaior the llike.V

f .The invention is more especially adapted for use, on iire places, chimneys,.or.stove pipes, but not foruse on factory chimneys,

or locomotive engines.

`The invention is especially intended to, provide a cheap, simple and eiiicient apparatus which may be conveniently mounted onthe top of the lflue and will not require any` attention when in use, but is self-cleaning and not liable to get out of'order, is quite durable even though subjected to such conditions .as exposure to the weather, or rain,

snow, or the like, and the usual variations of temperature which are inevitable inthe -use of such apparatus.` Y. p My invention will be more fully under-i stood after reference to the accompanying drawings in which like parts are indicated by similar reference symbols throughout the .several views, and in which.:

Figure 1 is a side elevation of the spark arrester, parts being broken away, and the chimney on which itl is mounted being shown in dotted lines. Y

Figure 2 is a plan view of the apparatus shown in Figure l detached from the chimney. parts being broken away.

Figure 3 shows a central vertical section along the line 8f3 of Figs. 1f and 2, and looking in the direction of the arrows.

Figure L shows a section along the line 4 4 of Figure l, and looking down; and

Figure 5 shows a modification in which Y thel supporting pan is made circular and especially adapted for use with a cylindrical sinolrestack or stove pipe. r

Referring first to Figures l to 4, A shows the' chimney which may be of any suitable or preferred form, having the usual flue A therein.

B represents a shallow pan which is r`adapted to rest 'on top of the chimney, which pan as shown is in the form of a square in cross section, having outwardly and upwardly inclined outer walls ZJ, and an inner wall b which is preferably cylindrical on ,the interior, and inthe form of a hollow Ifrustuin of a cone on the exterior, as vshown inFlgure 3;

Projecting'upward from the bottom of the panare -a series of supporting legs C, shouldered as at c to support theouter wire screen E which will be hereinafter more vfully described. These legs may be cast integral withfthe 4.pan B, or may be made separately and soldered or otherwise secured to said pan.

D represents the inner cylindrical screen of wire mesh having its bottom adapted to .wedgedown over the upwardly tapered flange and the top lof the screen D is provided with a stiffening ring D which may be made of any suitable construction, but is shown as a circular ring having inturned tabs cl which are fastened to the wire screen D by means of suitable rivets d. This wire screen D is open at the top and bot- -toinas shown, andsurroundiiig this inner screen, and spaced therefrom, is the outer cylindrical screen E, the lower end of which rests on'the shoulders c ofthe legs C, and is secured to said legs by means of suitable bolts t.

The upper end of this cylindrical screen E is provided with a reinforcing ring E, which may be of any suitable construction, but as shown is an annular band provided with inturned tabs e', said ring being fastened to the screen E by means of rivets e.

Mounted over the outer cylindrical screen E, and closing the upper end thereof, is a circular cap F` preferably flanged downwardly on its exterior, as at f, which cap may be connected to the upper end of the outer screen E in any convenient way, as by the band F. having inwardly turned tabs f which yare fastened to said cap by means of the rivets g. This cap is preferably made rel movable so that access may be had to the interior of the device when desired.

It will be noted that the lower edge of they the pan B is shown as Circular in horiaontal section instead ot rectangular as in the other ligures, but the operation of the dei'e is substantially the same in both cases. This operation will now be described :F The device may be mounted on the top of the chimney and cemented or otherwise secured thereto in any convenient way. ,fitter the parts are all in place, and with the top on, rain water or snow will soon accumulate in the pan, and this water will tend to *.ricllzle from the top of the cap down in the pan which projects beyond the edge of the cap, and thus the chamber in the pan surrounding the annular flange f will he normally supplied with water 'troni atmospheric conditions. lV hen lirst installed, water may be put in the pan it desired, but this will be unnecessary for the apparatus will not depend upon the presence of water Alior its elliciency in action.

As the solid particles carried up by the gases ot combustion rise into the sparlr arrester, the heavier particles are' either dropped downwards in the flue, to be subsequently consumed, or taken upwards again, or they will pass over the top of the ring D and will fall in the annular space between the two cylindrical screens D and E into the supporting pan. The water that will ordinarily be tound in this pan will promptly quench any sparks, but whether there is any water there or not, the gases passing,r over the outer wire screen will so lessen the convection currents ot the `rases that the solid particles will tend to tall and remain in the pan.

New when a rainfall occurs` especially a heavy rainfall, the rain water will Aflow i'reely into the pan and overflowing therein will carry most of the solid matter contained in the pan up over the sloping; wall ZJ, and the same will tall clear ot the chimney or smoke stack.

Owing` to this self-cleaning action ot the apparatus7 the Asolid particles will accumulate in the pan so slowly that the same need only be cleaned out by hand at long intervals, it at all. Should the apparatus become clogged up trom long;` continued use, or with particularly sooty "ruel, it may be cleaned out when desired by simply removing; the cap F, brushing the ad1 p nering solid 'particles vtrom the inner and outer screens D and l, and also cleaning; out the solid particles 'from the supporting pan, but as previously stated such cleaningwould only be necessary at long intervals.

llhen 'the capil is removed the inner screen D may be lifted oil of its seat on the annular flange o. and cleaned, or a new inner screen substituted therefor, itt desired.

lt will be seen that the apparatus may be yquickly assembled, or taken apart when desired, it'or pu 1poses of installation, removal, or repairs.

lt will also be seen that the device is of simple and cheap construction, but yet ot artistic design, and may be readily removed from or applied to the smolrestacl or chimney.

will be obvious that various modilications might be made the construction, coinbin ation and arrangement oit parts which could be used without departing; `from the spirit ot my invention, and l do not mean to limit the invention to such details except as particularly pointed out inv the claims.

Having l claim and desire to secure by Letters ent of the lUnited States is l, A sparlr arrester adapted ier use with lined chimneys or smolrestaclrs, comprising a pan provided with a central' opening adapted to register with the line, with an annular flange surrounding; said opening, said flange and said outer walls forming` atroulgh to receive the larger solid particles passing` up the flue, and also to receive water from rain or si'iow, an inner cylindrical screen open at both ends and having its lower end slipped over and engaging said annular flange, legs projecting upwardly from the bottom of said pan and arranged concentric with but spaced away 'trom `said annular flange, an outer cylindrical screen having its lower end secured to said legs, and a cap closingthe upper end of said outer screen, substantially as described.

2. l spark arrester adapted tor use with fixed chimneys or smolrestaclrs, comprising` a pan having,` outwardly and upwardly radial outer walls,l and provided with a ccntral openingv adapted to register with the Vflue, with a tapered annular flange surrounding` said opening, said flange and said outer walls forming a trough to receive the larger solid particles passing up the i'lue, and also to receive water from rain or snow, an inner cylindrical screen open at both ends and having its lower end slipped over and engaging said tapered annular flange, legs projecting upwardly from the bottom ot said pan and arranged concentric with but spaced away Arom said annular flange, an outer cylindrical screen having its lower end secured to said legs, the lower edge ot said outer screen beingr yapproximately at the level et the 'upper edge ot the outer walls ot the pan, and a cap elosinp' the upper end oit said outer screen, substantially as described.

tlius described my invention what PatlOli 

